//core-platform/dev/web/packages/ui/xsl/debug-panel.xsl has code that
generates a pretty-printed XML representation of the bebop page, as
well as the page layout structure, when the developer appends
"&transform=debug" to the URL. To show the structure visually, the
HTML for the pretty-printed representation is placed inside
<pre></pre> tags and uses indentation to convey the tree structure.
The stuff that goes inside the <pre> tag runs with no new lines
whatsoever, when Xalan is used. It works fine with Saxon.
Marking as low priority, since we don't use Xalan much (if at all).